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Ryobi RY905500 (Discontinued)

The Ryobi RY905500 is a portable open frame generator with a rated wattage of 5,500 W and a starting wattage of 6,875 W. (Read full specs)

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Ryobi RY905500Ryobi RY905500Ryobi RY905500

This product was discontinued. For your convenience, we decided to leave this page up.
It was replaced by the Ryobi RY906500S. However, you might still find it second hand on eBay, by clicking on the button below.

Description

The Ryobi 5,500-Watt Portable Generator with EasyStart technology is where efficiency meets convenience. With a Heavy Duty 420cc OHV engine, this generator delivers 5,500 Running-Watts (6,875 Surge/Starting-Watts) and is powerful enough to be used on a jobsite or as an emergency backup system. Featuring the EasyStart 3-Step starting system and a large 6 Gal. fuel tank, the Ryobi 5,500-Watt Generator can run up to 9 hours at 50% load. The Digital Hour Meter Display allows you to monitor essential functions such as Time of Use, Voltage, Hertz and Total Hours used. The Quick-Release handle provides easy and compact storage while the flat-free wheels and the Hand Truck Frame design allow for easy transport, even over rough terrain. This generator is also equipped with an Automatic Voltage Regulator that provides consistent power. The Control Panel features (4) 120-Volt 20 Amp (GFCI Protected) outlets and (1) 240-Volt Twist Lock 30 Amp outlet to meet all your power needs.

Zoom on the Ryobi RY905500

In summary, the Ryobi RY905500 is a portable generator especially useful for:

  • RV travellers wishing to enhance their freedom and nomad lifestyle
  • Occasional participants of outdoor events, competitions, concerts and festivals
  • Food van owners who know that just a short power outage could lose them hundreds of dollars
  • Homeowners who want to be sure of their ability to power their fridges, cooking tools, heating and lighting equipment during power failures
  • Professionals who want to ensure that a power failure will not prevent them from working

In the sections ahead, the power characteristics, availability of various outlets, the portability, and any additional features of the device shall be discussed, including its emission compliance information.

Power & Run Time

The Ryobi RY905500 in use

The Ryobi RY905500

The Ryobi RY905500's core is the 420 cc Ryobi OHV 4-stroke engine, which runs on gasoline. With an output of 120/240V, it provides a running wattage of 5,500W and a peak wattage of 6,875W.

At a noise rating of 78 dBA (less noisy than a shower), the generator is started via Ryobi's EasyStart pull-start mechanism (more information below).

With a full tank, the RY905500 can operate for around 10 hours at 50% load (fuel consumption around 0.6 GPH), thanks to its fuel capacity of 6 gallons.

The quite high THD (<20%) of the RY905500 makes it unsuitable for powering sensitive electronic devices.

Outlets

The control panel features the upcoming 5 AC outlets:

Two Duplexes 120V 20A (5-20R) GFCI
120/240V 30A (L14-30R) receptacle

Due to the featured twist-lock L14-30R receptacle, the RY905500 is transfer switch ready: you may connect it to a breaker box to power your household during a power outage.

Portability

The dimensions of the Ryobi RY905500, which are L31.5 x W29 x H24 in, and its typical, open frame design provides stability and enables the generator to be raised above ground level. The device has been designed for tough environments and demanding outdoor use.

Although this generator is technically considered 'portable' (in the sense that it can be moved), its 192 lbs make it incredibly difficult to manually lift and transport. Nevertheless, it can still be moved quite conveniently with the help of its wheel kit and its folding handle, once it is placed on the ground.

EasyStart Mechanism

ryobi easystart starting mechanism

Ryobi's 3-step EasyStart mechanism

The unit benefits from Ryobi’s EasyStart mechanism. This 3-step starting system allows you to easily start your generator. It works in the following way:

  1. Put the engine switch on the “ON” position, and place the lever on the “START” position
  2. Pull the recoil until the engine runs
  3. Let the engine run 15 to 30 seconds and place the lever on the “RUN” position

Features

Panel of the Ryobi RY905500

The RY905500's control panel

To help you monitor the RY905500's status and activity, its control panel is equipped with a convenient meter showing you voltage, frequency and lifetime hours.

As for its security measures, the device features an automatic low oil shut-off and an overload protection (circuit breaker), letting you use it with a peace of mind.

With the basic documentation and an owner's manual (opens in a new tab), letting you start the generator quickly, the Ryobi RY905500 also comes with several accessories, including: tool kit and oil.

Emissions

The Ryobi RY905500 is EPA approved, but NOT CARB-compliant. Thus, it cannot be purchased or sold in California.

However, it features a spark arrestor, which makes it suitable for use in forested areas.

Product Video

The Ryobi RY905500 versus other generators

The following charts are provided to give you an idea of how some of the key specs of the Ryobi RY905500 compare to generators of similar power (between 5000 and 6000 W).

  • With its weight of 192 lbs, the Ryobi RY905500 is one of the heavier generators in the 5000-6000 rated wattage category. If weight is your top priority, one of the champions in this power category is the Champion 201238, weighing just 101.4 pounds.
  • This generator, with its lowest possible noise rated at 78 dBA falls into the more noisy category, compared to other devices of a similar running wattage. If noise emissions are important to you, one of the least noisy generators of this power range is the Honda EU7000iS with only 52 dBA.
  • The RY905500's autonomy is somewhat low end compared to devices of its power range, as it reaches only around 10 hours at 50% load on a full tank. If concerned with autonomy, one of the products of a comparable power output, which offers the highest run time, is the Cat RP5500, boasting with around 15 hours.
  • Autonomy holds its importance, however, it is largely dependent on the generator’s fuel capacity and so, it is nonsensible to discuss it without mentioning fuel efficiency as well. This generator is not fuel efficient compared to devices of similar output: its estimated fuel consumption stands at 0.6 GPH at a 50% load. If fuel consumption is your top priority, we suggest to check out the A-iPower SUA7000L, which has a fuel consumption of only 0.36 GPH and thus, is one of the most efficient devices in our database.

The bottom line

STRENGTHS:
  • Several accessories included
  • GFCI Outlets
WEAKNESSES:
  • No electric start
  • Not CARB-compliant
  • On the heavy side (192 lbs)
  • On the noisy side (78 dBA)
  • Relatively low run time
  • Low fuel efficiency

Do you own the Ryobi RY905500 and agree (or disagree) with these strengths and weaknesses?

Let us know and write your own review.

Features and Specifications

General
InverterNo
Parallel capableNo
RV readyNo
FuelGasoline
Engine420 cc Ryobi OHV 4-stroke
Starting systemRecoil
Warranty3 years
Power
VoltageAC: 120/240V 60 Hz
Running watts5,500 W
Starting watts6,875 W
Running amps (@120/240V)45.8/22.9 amps
Peak amps (@120/240V)57.3/28.6 amps
Run time @50% load10 h
Run time @25% loadUnknown
Features
GFCI outletsYes
Covered outletsYes
Automatic Voltage RegulationYes
AC outlets
  • 2x Duplex 120V 20A (5-20R) GFCI
  • 1x 120/240V 30A (L14-30R)
DC outletsNo
Data centerVFT
IndicatorsNo
Fuel tank6 gal
Fuel gaugeNo
Misc
Weight192 lbs
Approx. dimensions (L x W x H)31.5 x 29 x 24 in
Noise (lower limit)78 dBA
THD< 20%
ComplianceEPA
SecurityLow oil and overload protection
Spark arrestorYes
NeutralBonded to frame
Accessories includedOil, tool kit, and wheel kit
UPC046396010056

Unlike many websites, we did our best to research each of the specs above. That being said, we are not immune to making the occasional mistake or omission. Should you notice any missing or incorrect values, don't hesitate to suggest improvements so we can address the issue.

Spec Improvement×

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About Ryobi

Founded in 1943, Ryobi Limited is a Japanese based manufacturer that throughout its history mainly focused on electrical and automotive components. However, their quite recent power tool branch has proven to be popular for the quality and reliability of its products, which are nowadays found globally on the shelves of popular retailers. Ryobi products are listed to be produced in various locations globally, mainly US, Germany, Japan and China.

Warranty Information

The Ryobi RY905500 is covered under a warranty for up to 3 years. This warranty may be limited and may not cover all parts of the generator.
For more information about the warranty of Ryobi generators, please consult Ryobi's warranty policies (opens in a new tab). Alternatively, you can also contact their Customer Support: 1-800-525-2579.

Questions & Answers

What can it power?
Examples of items that can be simultaneously powered.
The examples below are based on a maximum load of 80% and estimated wattages. For a more accurate estimation, use our generator sizer.
ItemRunning WattsStarting Watts
At homeMicrowave (1000 watts)15001500
AC (10,000 BTU)15002200
Sump pump (1/2 hp)10502150
Refrigerator (energy star)1921192
Radio100100
Set of 5 LED light bulbs5555
Total4397 W5497 W
For campingRV AC (11,000 BTU)10101600
RV refrigerator180600
Hair dryer18001900
Radiant heater13001300
Radio100100
Total4390 W4980 W
For workTable saw18004500
Grinder14002500
Reciprocating saw730960
Bug zapper8080
Total4010 W6710 W
Is there a conversion kit to electric start? (Asked October 15, 2019)

As far as we know, there are no official conversion kits that serve that purpose.

what spark plug belongs in the 420 cc (Asked November 06, 2021)

Spark plug should be LG F7TC or equivalent.

how much oil does it take (Asked October 03, 2022)

Engine oil capacity is approximately 37 fl.oz.

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